Device for driving of sliding roofs, window raisers, or the like

Abstract

A device for driving of sliding roofs, window raisers, or the like, especially of motor vehicles, with a reversible drive motor (1) and a worm gear pair on an output side of the drive motor, with a shaft of a worm gear (2) forming an extension of the motor shaft. The axial play of the worm gear shaft (2) is adjustable by an adjustment part (4) which rests against a distal end of the worm gear shaft (2) and which is movably guided in an axial direction of the worm gear shaft (2). The adjustment part (4) can be pressed against a stationary guide surface (17) by a positioning screw (12) which is screwed into an opening of this guide surface (17) or by a fastening rivet (22) which penetrates a hole (23) in the guide surface. The longitudinal axis of the screw (12) or rivet (22) is at least approximately perpendicular to the worm gear shaft axis (9).

I claim: 
     
       1. Device for driving of a movable part of a motor vehicle, comprising a reversible drive motor to which a worm gear pair is connected on an output side of the motor, a worm gear shaft of which is formed as an extension of the motor shaft, and means for adjusting axial play of the worm gear shaft, said means having an adjustment part which rests against a free end of the worm gear shaft and which is movably guided in an axial direction of the worm gear shaft; wherein the adjustment part is engageable against a stationary guide surface by one of a positioning screw and a fastening rivet which extends through a hole in the stationary guide surface with a longitudinal axis thereof being at least approximately perpendicular to a longitudinal axis of the worm gear shaft, said one of a positioning screw and a fastening rivet tightly securing said adjustment part by acting thereon in the axial direction of the worm gear shaft. 
     
     
       2. Device according to claim 1, wherein the adjustment part is provided with a longitudinal opening which extends in the axial direction of worm gear shaft and through which a shaft of said one of the positioning screw and fastening rivet passes. 
     
     
       3. Device according to claim 2, wherein the adjustment part is formed of a material which is soft as compared to a material of which said one of the positioning screw and fastening rivet is formed for enabling a head of said one of the positioning screw and fastening rivet to be buried therein when the adjustment part is pressed against the stationary guide surface by said one of the positioning screw and fastening rivet. 
     
     
       4. Device according to claim 3, wherein the adjustment part is formed of plastic. 
     
     
       5. Device according to claim 1, wherein the adjustment part is formed of a material which is soft as compared to a material of which said one of the positioning screw and fastening rivet is formed for enabling a head of said one of the positioning screw and fastening rivet to be buried therein when the adjustment part is pressed against the stationary guide surface by said one of the positioning screw and fastening rivet. 
     
     
       6. Device according to claim 5, wherein the adjustment part is formed of plastic. 
     
     
       7. Device according to claim 5, wherein the adjustment part has receiver for a distal end of the worm gear shaft which prevents lateral yielding of the worm gear shaft in the direction away from an axis of rotation of a worm wheel of the worm gear pair. 
     
     
       8. Device according to claim 5, wherein the adjustment part is guided in a guide rail which is open in a direction toward a head of said one of the positioning screw and fastening rivet, and which has a U-shaped cross section, a bottom of the guide rail forming the stationary guide surface. 
     
     
       9. Device according to claim 8, wherein the guide rail forms one part of a two-part housing for the worm gear pair. 
     
     
       10. Device according to claim 1, wherein the adjustment part has receiver for a distal end of the worm gear shaft which prevents lateral yielding of the worm gear shaft in the direction away from an axis of rotation of a worm wheel of the worm gear pair.